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IRC Bridge Design Suite

Hydraulics · Superstructure · Substructure · Foundation · Stability · IRC:5 / IRC:6 / IRC:112 / IS:1893

Ready — enter data or load sample project

All calculations per IRC:5-2015, IRC:6-2017, IRC:112-2020, IS:1893 (Part 3)

Span

—

HFL

—

Max UR Pier

—

Base Press.

—

Stability

—

Project Information

Name of Work / Bridge

Location / Chainage

Client / Authority

Designed by

Date

Design Code Set IRC:5-2015, IRC:6-2017, IRC:112-2020, IS:1893-2016 IRC:5, IRC:6-2014, IRC:112-2011

Notes / Remarks

Code Verification Directives

• IRC:5-2015 Hydraulics (Regime width, Mean Scour $d_s$, Pier local scour)
• IRC:6-2017 Load Combinations (Table 3.1 & 3.2 Matrix)
• IS:1893 (Part 3) Dynamic Spectral Seismic Response ($A_h$)
• IRC:112-2020 SLS Elastic Stress Limits & Parabolic Strain Checks
• IRC:112 Biaxial Parabolic Strain Vectoring ($\alpha_n$ formula)
• Correct Elastic Soil Pressure Calculation for Partial Uplift

Fully verified IRC engineering logic suite. Ideal for rapid structural verification, preliminary design, and checking.

Hydraulic Data (IRC:5 / SP:13)

Catchment Area A (km²)

Design Return Period 50 year 100 year 200 year

Bed Level (m)

HFL computed (m)

Design Discharge Q (m³/s)

Linear Waterway W (m)

Lacey silt factor f

Scour Multiplier (Pier)

Freeboard req. (m)

Computed Hydraulic Results (IRC:5)

Mean Scour Depth $d_s$

—

Max Scour Level (Pier)

—

Required Soffit Lvl

—

Lacey Regime Width $P$

—

Mean Velocity $V$

—

Flow Intensity $q$

—

IRC:5 Formulas: $q = Q/W$; $d_s = 1.34 \times (q^2/f)^{1/3}$; Max Scour Level = $\text{HFL} - (k_s \cdot d_s)$

Hydraulic Cross-section Sketch

Superstructure Geometry

Span c/c (m)

No. of spans

Skew angle (°)

Carriageway width (m)

Footpath each side (m)

Overall deck width (m)

No. of long. girders

Girder depth (mm)

Web thickness (mm)

Deck slab thk (mm)

Wearing coat (mm)

Camber (%)

Substructure & Levels

RTL / Road level (m)

Cap top level (m)

Pier top level (m)

Footing top (m)

Pier Shaft L × B (m)

Cap size L × B × D (m)

Footing L × B × D (m)

Materials (IRC 112-2020)

Concrete (Super) M30M35M40M45M50

Concrete (Sub) M30M35M40

Steel Grade Fe415Fe500Fe550

Clear cover (mm)

γ_c concrete (kN/m³)

SBC Soil (kN/m²)

μ Friction Base

Deck Cross-section

Elevation View

IRC:6 Live Loads

Governing Vehicle Class A Class 70R (Tracked/Wheeled) Special Vehicle (SV)

No. of lanes

Impact Factor $\eta$ (IRC:6 Cl 208)

Pedestrian LL (kN/m²)

Seismic (IS:1893 Part 3 / IRC:6)

Seismic Zone Zone II (Z=0.10) Zone III (Z=0.16) Zone IV (Z=0.24) Zone V (Z=0.36)

Importance Factor $I$

Response Reduction $R$

Soil Type Hard / Rock (Type I) Medium (Type II) Soft (Type III)

Fundamental Period $T$ (s)

Permanent & Self Loads Summary

ULS / SLS Load Combinations (IRC:6 Table 3.1 & 3.2)

#	Combination Code Name	$P_u$ (kN)	$M_{ux}$ (kNm)	$M_{uy}$ (kNm)	$V_u$ (kN)	$H_u$ (kN)	Limit State

Partial load safety factors dynamically applied based on IRC:6 Annex B.

Longitudinal Girder Design Check (IRC:112)

Effective span $L_e$ (m)

Self Weight DL (kN/m)

SIDL (kN/m)

LL + Impact BM $M_{LL}$ (kNm)

LL + Impact Shear $V_{LL}$ (kN)

Mid-Span Bending Moment IL

Pier Shaft Check (IRC 112 Biaxial)

Design $P_u$ (kN)

$M_{ux}$ Traffic (kNm)

$M_{uy}$ Transverse (kNm)

Shear Force $V_u$ (kN)

Longitudinal Steel $p_t$ (%)

Slenderness Check (IRC:112 Cl 11.2)

Biaxial Interaction Diagram ($M_{ux} - M_{uy}$)

Pier Cap Cantilever Check

Cap depth $D$ (mm)

Cantilever projection (m)

Max Bearing Reaction (kN)

Footing Base Pressure Analysis

Vertical Load $P$ (kN)

Moment $M_x$ Traffic (kNm)

Moment $M_y$ Transverse (kNm)

Footing Length $L$ (m)

Footing Width $B$ (m)

Depth $D$ (m)

Corner Soil Pressure Distribution

Global Stability Checks

Restoring Moment $M_R$ (kNm)

Overturning Moment $M_O$ (kNm)

Horizontal Force $H_D$ (kN)

Min FS Overturning

Min FS Sliding

Elastomeric Bearing Movement Check

Span $L_e$ (m)

Temp. Range $\pm \Delta T$ (°C)

Shear Modulus $G$ (MPa)

Bearing Dim $a \times b$ (mm)

STRUCTURAL DESIGN CALCULATION REPORT

Bridge across Godavari Odha

IRC:5-2015 · IRC:6-2017 · IRC:112-2020 · IS:1893 (Part 3) | Verified Engine Execution

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